Hawkins electrical guide. Questions, answers & illustrations; a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 215
rent is ledinto the rings by means■>f carbon brushes, thenumber of brushes be-ing such that the cur-rent density at the rub-bing contact is keptwithin conservati.elimits. At least twobrushes per ring areprovided, so that one.hi be removed for ir-•ion without inter-rupting the excitingcurrent. In… … Pig. 1,473.—Fort Wayne multi-phase revolving armature al-ternator, designed for use insmall power plants and isolatedlighting plants where inductiveloads are encountered. Builtfor pressures of 120, 240. 480,and 600 volts. These voltageshave been recommended by theAmerican Institute of Electri-cal…
Electrical engineering
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